body-region

Updated: February 12, 2026

The third body-region, the head, includes six segments, of which three surrounded the mouth and furnished the jaws, while two more were crowded or drawn forward in order that their ganglia might be added to the old supraoesophageal ganglion and form a brain.

John Mason Tyler - The Whence and the Whither of Man : A Brief History of His Origin and Development through Conformity to Environment; Being the Morse Lectures of 1895